Surge Shard
 Psyker Build - Warhammer 40k: Darktide 

So this is my revamp of surge shard(previously used empowered psionics).. assail and the surge staff built this way scale insanely well with maxed out finesse and and true aim goes brrr with surge staff/assail chucking.. it's honestly one of the most nutty anti special/ranged elites builds there is.. it obliterates everything outside of a crusher/monster(but that's what your dueling sword is for combined with combo casting surge staff).. and the finesse damage is so high even without damage buffs vs monsters.. you can still kill them relatively easy.. easily the highest dps build for the surge staff.

Perfectionism and Lingering Influence are interchangeable depending on needs.. sometimes with a far too competent team and not enough density, perfectionsim can be unabtainable.. so in this case lingering influence is there. personally. I cruel fortune should be replaced with something else and it's stat just a baseline for both sides.. i mean you should be rewarded for weak spot kills by default.. but fat shark being fat shark.. apparently you have to spend a friken talent to aquire this. anyways.. i hope they change it one day.. it's honestly a little cruel.. literally.. talents like that should always be baseline for an ability ffs. anyways.. in my experience the only time cruel fortune felt necessary, is in the build Void Flurry, where you really need to capitalize on stack accumulation to get the most of the build, with a staff that is harder to aquire them with. In this build however.. stack accumulation with a snappy surge staff doing pure bolt damage plus assail.. you really shouldn't be having any trouble with stackage.